The role of zirconia in cobaltosic oxide catalysts for low-temperature CO oxidation

A series of Co 3 O 4 /ZrO 2 catalysts for low-temperature CO oxidation was prepared with different ZrO 2 loadings and different preparation methods, and then characterized by low-temperature N 2 adsorption/desorption, XRD, TEM, XPS, UV-vis, CO-TPR, CO adsorption and CO 2 desorption. The results show...

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Bibliographic Details
Published in:RSC advances 2016-01, Vol.6 (112), p.1117-11178
Main Authors: Du, Fan, Wu, Guisheng, Mao, Dongsen, Lu, Guanzhong
Format: Article
Language:English
Subjects:
Adsorption
Carbon monoxide
Catalysis
Catalysts
Cobalt oxides
Desorption
Oxidation
Zirconium dioxide
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Summary:A series of Co 3 O 4 /ZrO 2 catalysts for low-temperature CO oxidation was prepared with different ZrO 2 loadings and different preparation methods, and then characterized by low-temperature N 2 adsorption/desorption, XRD, TEM, XPS, UV-vis, CO-TPR, CO adsorption and CO 2 desorption. The results show that ZrO 2 not only increases the specific area and decreases the crystal size of Co 3 O 4 in CZ-c-20 and CZ-f-20, but also promotes production of Co 2+ and -O − , which shows the high catalytic activity for CO oxidation. The facile decomposition of carbonate and the high redox properties over ZrO 2 promote the catalytic stability for CO oxidation. A series of Co 3 O 4 /ZrO 2 catalysts for low-temperature CO oxidation was prepared, and then characterized by low-temperature N 2 adsorption/desorption, XRD, TEM, XPS, UV-vis, CO-TPR, CO adsorption and CO 2 desorption.
ISSN:2046-2069
2046-2069
DOI:10.1039/c6ra23098a